本文選題：煙道氣 + 脫硝��； 參考：《昆明理工大學》2017年碩士論文

【摘要】：隨著人口的不斷增長和人們物質生活水平的不斷提高,經濟增長與環(huán)境保護之間的矛盾日益突出,尤其近幾年霧霾天氣肆虐橫行,已經嚴重影響到了人們的正常生活,給人們的身體健康與生活環(huán)境帶來了巨大威脅。過量排放的NOx是造成霧霾的罪魁禍首之一,NOx的治理迫在眉睫,為此,我國不斷提高排放的要求,并提出了實現(xiàn)50 mg/m3超低排放目標,而為滿足日益嚴格的環(huán)保排放要求,提高脫硝效率、降低脫硝成本是現(xiàn)今治理大氣污染的重要研究內容之一。本文利用黃磷作為間接的氧化劑,對黃磷磷礦漿復合吸收液脫硝工藝以及黃磷與氧氣反應產生臭氧的條件和機理進行了研究,旨在通過對磷礦漿脫硝的研究,結合現(xiàn)有的磷礦漿濕法脫硫技術,為未來在磷化工企業(yè)實現(xiàn)磷礦漿同時脫硫脫硝服務。通過研究,主要得到了以下結論:(1)考察了各實驗因素對黃磷磷礦漿復合吸收液脫硝的影響,發(fā)現(xiàn)漿液體系的脫硝率隨黃磷濃度、漿液pH、煙氣含氧量、攪拌速度的增加而增加;隨漿液溫度、漿液含固量的增加先增加后減小;隨NOx入口濃度、氣量的增加而降低。根據(jù)實驗結果,較合適的實驗條件為:黃磷濃度1.6g/L,漿液pH控制在3.76以上,漿液溫度65℃,漿液含固量為9.09%,氧氣濃度6%,煙氣流量535mL/min。(2)通過響應面優(yōu)化實驗,分析了 P4/NOx、漿液溫度、漿液pH和氣量對黃磷磷礦漿復合吸收液脫硝效率的影響以及它們之間的交互作用,各因素對漿液脫硝率影響程度的強弱由大到小依次為:P4/NOx、漿液溫度、氣量、漿液pH;P4/NOx、漿液溫度、氣量、P4/NOx和漿液溫度的二次項、P4/NOx和漿液溫度的交互項、漿液溫度和氣量的交互項以及P4/NOx和氣量的交互項對漿液脫硝率有顯著影響。(3)對黃磷磷礦漿復合吸收液生成臭氧的規(guī)律進行了研究,發(fā)現(xiàn)提高攪拌速度、黃磷濃度有利于臭氧的生成,臭氧濃度隨漿液溫度的增加呈先增加后減小趨勢,最適宜的溫度為65℃;不同分散介質對黃磷生成臭氧的影響很大,主要原因在于不同物質的顆粒大小和顆粒表面形貌不同;進一步研究表明,黃磷與氧氣生成臭氧的反應主要發(fā)生在液相,為液相中的氣液接觸反應。
[Abstract]:With the continuous growth of population and the continuous improvement of people's material living standard, the contradiction between economic growth and environmental protection is becoming increasingly prominent, especially in recent years the haze weather is rampant, which has seriously affected the normal life of people. It has brought great threat to people's health and living environment. As one of the main culprits causing smog, it is urgent to control the excess no _ x emission. Therefore, our country has continuously raised the emission requirements, and put forward the goal of achieving the 50 mg/m3 ultra-low emission, in order to meet the increasingly stringent requirements of environmental protection emissions. To improve denitrification efficiency and reduce denitrification cost is one of the important research contents of air pollution control. In this paper, using yellow phosphorus as indirect oxidant, the denitrification process of yellow phosphorus pulp compound absorbent and the conditions and mechanism of the reaction of yellow phosphorus with oxygen to produce ozone were studied in order to study the denitrification of phosphate rock pulp. Combined with the existing wet desulphurization technology of phosphate rock slurry, it serves for the realization of simultaneous desulphurization and denitrification of phosphate rock slurry in phosphorous chemical enterprises in the future. The main conclusions are as follows: (1) the effects of various experimental factors on denitrification of yellow phosphorus pulp were investigated. It was found that the denitrification rate of the slurry system increased with the increase of yellow phosphorus concentration, pulp pH, flue gas oxygen content and stirring speed. The solid content of the slurry increases first and then decreases with the increase of the temperature of the slurry, and decreases with the increase of the inlet concentration of no _ x and the increase of the gas content. According to the experimental results, the suitable experimental conditions are as follows: yellow phosphorus concentration 1.6 g / L, slurry pH above 3.76, slurry temperature 65 鈩，

本文編號：2005525